We show that the dynamics of Einstein Gravitation Theory may be understood
as an effective theory of a quantum theory for a fluctuating space-time imp
lemented as a Bosonic string path integral and interacting with a non-dynam
ics Einstein space-time metric field (the quantum gravitation vacuum). Addi
tionally, we show how to deduce SU(N) Yang-Mills Gauge theories from a stri
ngy SO(D) space-time with an intrinsic SU(N) fermionic structure at large N
.